Chicken And Chili Soup

• 1 1/2 cauliflower flowerets chopp
• 1 onion (finely chopped)
• 1 garlic clove (minced)
• 1 celery stalk (diced)
• 1,100 ml chicken stock defatted
• 260 gr kidney beans
• 110 gr cheddar cheese
• 110 gr chicken br (skinless boneless)
• 60 ml water (cold)
• 16 gr cornstarch